The BGS Lexicon of Named Rock Units — Result Details

Pumphouse Member

Computer Code: PMP Preferred Map Code: PMP
Status Code: Full
Age range: Burrellian Stage (OK) — Burrellian Stage (OK)
Lithological Description: Mudstone.
Definition of Lower Boundary: Where seen, the mudstone unit overlies the Doon Hill Conglomerate Member of the Balclatchie Formation.
Definition of Upper Boundary: The mudstone unit is overlain by the Burn Side Conglomerate Member of the Balclatchie Formation (where seen).
Thickness: Estimated at about 10m
Geographical Limits: The Girvan area of southwest Scotland.
Parent Unit: Balclatchie Formation (BCH)
Previous Name(s): Balclatchie Mudstones [Obsolete Name And Code: Use BCH] (BBM)
Balclatchie Beds (-3823)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Balclatchie Farm area. Williams, 1962. 
Reference(s):
Williams, A, 1962. The Barr and Lower Ardmillan Series (Caradoc) of the Girvan district, southwest Ayrshire, with descriptions of the Brachiopoda. Memoir of the Geological Society of London, No.3. 
Fortey, R A, Harper, D A T, Ingham, J K, Owen, A W, Parkes, M A, Rushton, A W A and Woodcock, N H. 2000. A revised correlation of Ordovician rocks in the British Isles. Geological Society Special Report, No.24. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable